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medicine family cardiology gynecology heart obstetrics menopause embolism valvular ccu failure epidemiology cardiac drugs cadiopulmonary emergenc er mi imaging prosthetic heart valve obstruction infarction myocardial complications pacemakers bradyarrhythmias arrhythmia malfunctioning electrolytes base balance acid dvt thrombosis health valve std appraisal critical study trial research asthma copd chest treatment management bronchial care antenatal hypertension practice general hypothyroidism obgyn mht hrt hormonal wide ventricular tachycardia vtach complex aortic disease mitral pulmonary